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	Ambient noise tomography across the taiwan strait, taiwan island, and southwestern ryukyu arc: implications for subsurface slab interactions
	Ai, Sanxi1,2,3; Zheng, Yong2; Xiong, Cheng1,2,3
刊名	Tectonics
	2019-02-01
卷号	38期号:2页码:579-594
关键词	Taiwan orogen Ambient noise tomography Lithospheric structure Subduction flapping Subsurface slab interactions
ISSN号	0278-7407
DOI	10.1029/2018tc005355
通讯作者	Zheng, yong(zhengyong@cug.edu.cn)
英文摘要	The subduction flipping in the taiwan region leads to complexities in the lithospheric structure. to better understand the arc-continental collision process in this zone, we construct a 3-d lithospheric model of the taiwan strait, taiwan island, and southwestern ryukyu arc. in the middle to lower crust, low velocities are mainly located beneath the ryukyu trough and the rifted basins in the taiwan strait, and high velocities are imaged in the kuanyin and penghu platforms. likely, the kuanyin and penghu platforms act as relatively strong barriers that block the persistent westward advance of the western deformation front of the taiwan mountain belt, as manifested by shape of the deformation front that withdraws to the east in the basement highs. in the mantle, high velocities are observed beneath the central range and ryukyu arc, which is interpreted as the two oppositely oriented slab subductions, that is, subduction of the philippine sea slab in the northeast taiwan and eurasian slab subduction in south taiwan. based on the vertical transects through our 3-d model, we find that the subduction polarity has flipped in north taiwan, and the tectonic framework in central taiwan is in the process of subduction polarity reversal. we also image significant low mantle velocities beneath the north taiwan volcanic zone and taihsi basin, which may be related to the breakoff of the subducting eurasian slab. in addition, we propose that the inherited weakness of the taihsi basin may have facilitated the slab breakoff in central taiwan. plain language summary in this work we collect the seismic data recorded by seismic stations in and around the taiwan orogen and build a high-resolution lithospheric velocity model for an area including the taiwan strait, taiwan island, and southwestern ryukyu arc by ambient noise tomography. the model exhibits low crust velocity anomalies in the ryukyu trough and rifted basins of the taiwan strait, and low velocities in the uppermost mantle beneath the north taiwan volcanic zone and taihsi basin. based on the tomographic images, we clearly find that the subduction polarity has been flipped in north taiwan, and the tectonic framework in central taiwan is in the process of subduction polarity reversal, which is in consistent with the geological observations.
WOS关键词	VELOCITY STRUCTURES BENEATH ; RAYLEIGH-WAVE TOMOGRAPHY ; CONTINENT COLLISION ; NORTHERN TAIWAN ; JOINT INVERSION ; POSTCOLLISIONAL MAGMATISM ; SUBDUCTION POLARITY ; P-WAVE ; SURFACE ; MODEL
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000462017800008
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373157
专题	武汉植物园
通讯作者	Zheng, Yong
作者单位	1.Chinese Acad Sci, Inst Geodesy & Geophys, State Key Lab Geodesy & Earths Dynam, Wuhan, Hubei, Peoples R China 2.China Univ Geosci, Inst Geophys & Geomat, State Key Lab Geol Proc & Mineral Resources, Wuhan, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Ai, Sanxi,Zheng, Yong,Xiong, Cheng. Ambient noise tomography across the taiwan strait, taiwan island, and southwestern ryukyu arc: implications for subsurface slab interactions[J]. Tectonics,2019,38(2):579-594.
APA	Ai, Sanxi,Zheng, Yong,&Xiong, Cheng.(2019).Ambient noise tomography across the taiwan strait, taiwan island, and southwestern ryukyu arc: implications for subsurface slab interactions.Tectonics,38(2),579-594.
MLA	Ai, Sanxi,et al."Ambient noise tomography across the taiwan strait, taiwan island, and southwestern ryukyu arc: implications for subsurface slab interactions".Tectonics 38.2(2019):579-594.

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